import java.util.Scanner;

public class OddEvenCheck {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个整数: ");
        int num = scanner.nextInt();

        if (num % 2 == 0) {
            System.out.println("这是一个偶数。");
        } else {
            System.out.println("这是一个奇数。");
        }

        scanner.close();
    }
}